Scroll type electrostatic precipitator and air conditioning apparatus having the same
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Solution Overview
Problem
Conventional scroll type electrostatic precipitators have lower collection efficiency for fine dusts due to irregular electrode fields and limited thickness in air conditioning applications, making it difficult to apply high voltages and enhance dust collection.
Innovation Solution
A scroll type electrostatic precipitator with a coiled high voltage electrode and ground electrode, featuring inclined turning flow paths formed by spaced members to increase the effective length of the dust flow path, allowing for higher voltage application and improved dust collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the thickness of the electrostatic precipitator is increased to increase the electric field functional length and improve dust collection efficiency, then the collection efficiency of fine dusts is increased, but the air conditioning apparatus becomes bulkier and less compact
Solution Approach 1:
The patent transforms the linear flow path into a multi-dimensional turning flow path by introducing inclined spaced members that create vertical and horizontal components. This allows the air flow to traverse a longer effective path (L_effective = L/cosθ) within the same thickness constraint, effectively adding dimensional complexity to overcome the thickness limitation.
Solution Approach 2:
The spaced members are designed with curved surfaces rather than straight lines, creating a smooth turning flow path. This curvature allows the air to follow a longer, more gradual path through the electric field without creating sharp turbulence, maximizing the effective path length while maintaining flow stability within the constrained thickness.
2Reliability
If the high voltage electrode is insulated to ensure safety, then safety is improved, but the uneven part of the ground electrode cannot be closely disposed to the high voltage electrode, limiting the applicable voltage to below 3 kV
Solution Approach 1:
The patent applies insulation selectively only at critical locations where high voltage is applied, rather than insulating the entire electrode uniformly. This localized insulation approach maintains safety at high voltage points while allowing other areas to achieve closer spacing for enhanced electric field strength.
Solution Approach 2:
The spaced members serve as intermediary structures that maintain precise spacing between the high voltage electrode and ground electrode. By positioning these spaced members at optimized locations, the patent achieves both the necessary insulation distance for safety and the close spacing needed for strong electric field generation in the turning flow path regions.
3Ease of manufacture
If conventional scroll type electrostatic precipitators are used with coiled electrodes, then manufacturing is simplified, but irregular electrode fields are formed reducing collection efficiency compared to plate type precipitators
Solution Approach 1:
The patent maintains the simple coiled electrode structure for ease of manufacture but introduces locally optimized features through the inclined spaced members. These spaced members create localized regions of enhanced and uniform electric field strength at critical positions, compensating for the inherent irregularities of the coiled structure without requiring complex electrode geometries.
Solution Approach 2:
The patent optimizes specific parameters of the spaced members (inclination angle θ, spacing distance d, and position) to control and enhance the electric field distribution. By carefully selecting these parameters, the turning flow path generates sufficient electric field strength and uniformity to achieve collection efficiency comparable to or exceeding plate type precipitators, while retaining the manufacturing simplicity of coiled electrodes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances fine dust collection efficiency by increasing the effective length of the electric field path, maintaining a constant electrode interval, and applying higher voltages, outperforming conventional scroll and plate type precipitators in terms of CADR and 1 pass efficiency.
Implementation Method 1
a high voltage electrode with voltage applied thereto and a ground electrode coiled in a circumferential direction along with the high voltage electrode while being spaced apart from the high voltage electrode
Implementation Method 2
electrostatic precipitator for collecting fine dusts
Implementation Method 3
a plurality of turning flow paths inclined with respect to an axial direction of the electrode part between the high voltage electrode and the ground electrode
Data Source
AI summary
An electrostatic precipitator is provided. The electrostatic precipitator includes an electrode part including a high voltage electrode with voltage applied thereto and a ground electrode coiled in a circumferential direction along with the high voltage electrode while being spaced apart from the high voltage electrode, and a plurality of turning flow paths inclined with respect to an axial direction of the electrode part between the high voltage electrode and the ground electrode.